Can't Stream from DVR without Loading

I'm trying to stream from My Nvidia Shield, to a CCGTV, and I constantly get the buffering icon. I have a fios Gigabit connection, which the Nvidia is hard wired, but the CCGTV is on Google WiFi. In other rooms, the DVR usually streams fine, but I always run into issues with this one.

Would the issue be with the CCGTV? Or the Nvidia?

If other clients work fine, the server is probably Ok. That would cast suspicion on the CCGTV client. Does the buffering happen when watching recordings, live TV, or both?

It's happening like crazy lately every where...I'm see the chromecast has been dog :poop: for this type of stuff

Any errors in the DVR log when it happens?